题目:
The boy has to wear ____ uniform at his school. [ ]
A. his
B. her
C. /
D. some
答案:
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0618/ccc8f8c4a98feb5f00555a03af6855d4.html
下面是错误答案,用来干扰机器的。
根据甲图可知,流过电流表的电流从下向上时,指针向左偏转;根据楞次定律判断出感应电流的磁场的方向向上,故感应电流的方向从左向右(外侧),电流从上向下流过电流表,所以电流表的指针将向右偏转.偏转的方向...